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<div class="section">
<div class="titlepage"><div><div><h4 class="title">
<a name="fusion.functional.adapters.fused_procedure"></a><a class="link" href="fused_procedure.html" title="fused_procedure">fused_procedure</a>
</h4></div></div></div>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h0"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.description"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.description">Description</a>
        </h6>
<p>
          An unary <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
          Object</a> adapter template for <a class="link" href="../concepts/callable.html" title="Callable Object">Callable
          Object</a> target functions. It takes a <a class="link" href="../../sequence/concepts/forward_sequence.html" title="Forward Sequence">Forward
          Sequence</a> that contains the arguments for the target function.
        </p>
<p>
          The result is discarded and the adapter's return type is <code class="computeroutput"><span class="keyword">void</span></code>.
        </p>
<p>
          The type of the target function is allowed to be const qualified or a reference.
          Const qualification is preserved and propagated appropriately (in other
          words, only const versions of <code class="literal">operator()</code> can be used
          for a target function object that is const or, if the target function object
          is held by value, the adapter is const - these semantics have nothing to
          do with the const qualification of a member function, which is referring
          to the type of object pointed to by <code class="literal">this</code> which is specified
          with the first element in the sequence passed to the adapter).
        </p>
<p>
          If the target function is a pointer to a members function, the corresponding
          object can be specified as a reference, pointer, or smart pointer. In case
          of the latter, a freestanding <code class="literal">get_pointer</code> function must
          be defined (Boost provides this function for <code class="literal">std::auto_ptr</code>
          and <a href="http://www.boost.org/libs/smart_ptr#shared_ptr" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span></code></a>).
        </p>
<p>
          The target function must not be a pointer to a member object (dereferencing
          such a pointer without returning anything does not make sense, so this
          case is not implemented).
        </p>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h1"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.header"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.header">Header</a>
        </h6>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">adapter</span><span class="special">/</span><span class="identifier">fused_procedure</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span>
</pre>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h2"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.synopsis"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.synopsis">Synopsis</a>
        </h6>
<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">fused_procedure</span><span class="special">;</span>
</pre>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h3"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.template_parameters"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.template_parameters">Template
          parameters</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Parameter
                  </p>
                </th>
<th>
                  <p>
                    Description
                  </p>
                </th>
<th>
                  <p>
                    Default
                  </p>
                </th>
</tr></thead>
<tbody><tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">Function</span></code>
                  </p>
                </td>
<td>
                  <p>
                    <a class="link" href="../concepts/callable.html" title="Callable Object">Callable
                    Object</a> type
                  </p>
                </td>
<td>
                </td>
</tr></tbody>
</table></div>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h4"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.model_of"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.model_of">Model of</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <a class="link" href="../concepts/poly.html" title="Polymorphic Function Object">Polymorphic Function
              Object</a>
            </li>
<li class="listitem">
              <a class="link" href="../concepts/def_callable.html" title="Deferred Callable Object">Deferred Callable
              Object</a>
            </li>
</ul></div>
<div class="variablelist">
<p class="title"><b>Notation</b></p>
<dl class="variablelist">
<dt><span class="term"><code class="computeroutput"><span class="identifier">R</span></code></span></dt>
<dd><p>
                A possibly const qualified <a class="link" href="../concepts/callable.html" title="Callable Object">Callable
                Object</a> type or reference type thereof
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">r</span></code></span></dt>
<dd><p>
                An object convertible to <code class="computeroutput"><span class="identifier">R</span></code>
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">s</span></code></span></dt>
<dd><p>
                A <a class="link" href="../../sequence.html" title="Sequence">Sequence</a> of arguments that
                are accepted by <code class="computeroutput"><span class="identifier">r</span></code>
              </p></dd>
<dt><span class="term"><code class="computeroutput"><span class="identifier">f</span></code></span></dt>
<dd><p>
                An instance of <code class="computeroutput"><span class="identifier">fused_procedure</span><span class="special">&lt;</span><span class="identifier">R</span><span class="special">&gt;</span></code>
              </p></dd>
</dl>
</div>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h5"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.expression_semantics"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.expression_semantics">Expression
          Semantics</a>
        </h6>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                  <p>
                    Expression
                  </p>
                </th>
<th>
                  <p>
                    Semantics
                  </p>
                </th>
</tr></thead>
<tbody>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">fused_procedure</span><span class="special">&lt;</span><span class="identifier">R</span><span class="special">&gt;(</span><span class="identifier">r</span><span class="special">)</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Creates a fused function as described above, initializes the
                    target function with <code class="computeroutput"><span class="identifier">r</span></code>.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">fused_procedure</span><span class="special">&lt;</span><span class="identifier">R</span><span class="special">&gt;()</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Creates a fused function as described above, attempts to use
                    <code class="computeroutput"><span class="identifier">R</span></code>'s default constructor.
                  </p>
                </td>
</tr>
<tr>
<td>
                  <p>
                    <code class="computeroutput"><span class="identifier">f</span><span class="special">(</span><span class="identifier">s</span><span class="special">)</span></code>
                  </p>
                </td>
<td>
                  <p>
                    Calls <code class="computeroutput"><span class="identifier">r</span></code> with
                    the elements in <code class="computeroutput"><span class="identifier">s</span></code>
                    as its arguments.
                  </p>
                </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h6"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.example"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.example">Example</a>
        </h6>
<pre class="programlisting"><span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">SequenceOfSequences</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">Func</span><span class="special">&gt;</span>
<span class="keyword">void</span> <span class="identifier">n_ary_for_each</span><span class="special">(</span><span class="identifier">SequenceOfSequences</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">s</span><span class="special">,</span> <span class="identifier">Func</span> <span class="keyword">const</span> <span class="special">&amp;</span> <span class="identifier">f</span><span class="special">)</span>
<span class="special">{</span>
    <a class="link" href="../../algorithm/iteration/functions/for_each.html" title="for_each"><code class="computeroutput"><span class="identifier">for_each</span></code></a><span class="special">(</span><a class="link" href="../../view/zip_view.html" title="zip_view"><code class="computeroutput"><span class="identifier">zip_view</span></code></a><span class="special">&lt;</span><span class="identifier">SequenceOfSequences</span><span class="special">&gt;(</span><span class="identifier">s</span><span class="special">),</span>
        <span class="identifier">fused_procedure</span><span class="special">&lt;</span><span class="identifier">Func</span> <span class="keyword">const</span> <span class="special">&amp;&gt;(</span><span class="identifier">f</span><span class="special">));</span>
<span class="special">}</span>

<span class="keyword">void</span> <span class="identifier">try_it</span><span class="special">()</span>
<span class="special">{</span>
    <a class="link" href="../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">&gt;</span> <span class="identifier">a</span><span class="special">(</span><span class="number">2</span><span class="special">,</span><span class="number">2.0f</span><span class="special">);</span>
    <a class="link" href="../../container/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">float</span><span class="special">&gt;</span> <span class="identifier">b</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">1.5f</span><span class="special">);</span>
    <span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lambda</span><span class="special">;</span>
    <span class="identifier">n_ary_for_each</span><span class="special">(</span><a class="link" href="../../container/generation/functions/vector_tie.html" title="vector_tie"><code class="computeroutput"><span class="identifier">vector_tie</span></code></a><span class="special">(</span><span class="identifier">a</span><span class="special">,</span><span class="identifier">b</span><span class="special">),</span> <span class="identifier">_1</span> <span class="special">-=</span> <span class="identifier">_2</span><span class="special">);</span>
    <span class="identifier">assert</span><span class="special">(</span><span class="identifier">a</span> <span class="special">==</span> <a class="link" href="../../container/generation/functions/make_vector.html" title="make_vector"><code class="computeroutput"><span class="identifier">make_vector</span></code></a><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">0.5f</span><span class="special">));</span>
<span class="special">}</span>
</pre>
<h6>
<a name="fusion.functional.adapters.fused_procedure.h7"></a>
          <span class="phrase"><a name="fusion.functional.adapters.fused_procedure.see_also"></a></span><a class="link" href="fused_procedure.html#fusion.functional.adapters.fused_procedure.see_also">See also</a>
        </h6>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
              <a class="link" href="fused.html" title="fused"><code class="computeroutput"><span class="identifier">fused</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="fused_function_object.html" title="fused_function_object"><code class="computeroutput"><span class="identifier">fused_function_object</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="../invocation/functions/invoke_proc.html" title="invoke_procedure"><code class="computeroutput"><span class="identifier">invoke_procedure</span></code></a>
            </li>
<li class="listitem">
              <a class="link" href="../generation/functions/mk_fused_proc.html" title="make_fused_procedure"><code class="computeroutput"><span class="identifier">make_fused_procedure</span></code></a>
            </li>
</ul></div>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2001-2006, 2011, 2012 Joel de Guzman,
      Dan Marsden, Tobias Schwinger<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
      </p>
</div></td>
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